Patent US4482943A successfully refreshed from Google Patents.
US4482943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tempered glass globe
Assignee: General Electric Co
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Filing: 1983-12-21
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Granted: 1984-11-13
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Expires: 2003-12-21
Abstract
Abstract A tempered glass globe for a hazardous location luminaire comprises a bowl portion and a flaring rim portion with the walls substantially uniform in thickness in both portions. The rim portion makes an angle of taper with the vertical in the range of 15° to 45° and defines a section of a conical surface for making a nonflame-propagating joint with a mating conical surface in a globe ring. The outside of the flared rim may be ground for sealing directly to an accurately machined metal surface.
Inventors
- 👤 Marcus P. Hogue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:08
CPC Classifications
F; F21; F21V; F21V15/00; F21V15/02; F21V25/00; F21V25/12; F21V3/00; F21V3/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
83 words
A tempered glass globe comprising a glass vessel having a bowl portion merging into a flaring rim portion which is circular in cross-section, the walls of said globe being at least 1/4 inch thick and substantially uniform in thickness throughout both portions, said rim portion making an angle of taper with the vertical in the range of 15° to 45°, said rim portion defining a section of a conical surface for making a nonflame-propagating joint with a member having a mating conical surface.
Claim 2
Dependent Claim
83 words
A tempered glass globe comprising a glass vessel having a bowl portion merging into a flaring rim portion which is circular in cross-section, the walls of said globe being at least 1/4 inch thick and substantially uniform in thickness throughout both portions, said rim portion making an angle of taper with the vertical in the range of 15° to 45°, said rim portion defining a section of a conical surface for making a nonflame-propagating joint with a member having a mating conical surface.
Claim 3
Dependent Claim
36 words
A globe as in claim 1 wherein the outside of said rim portion defines said section of a conical surface for nesting and making a nonflame-propagating joint with a support member having a mating conical surface.
Claim 4
Dependent Claim
47 words
A globe as in claim 2 wherein the outside of said rim portion is ground sufficiently true to a perfect conical surface over said section to make a nonflame-propagating joint with the accurately machined surface of a mating conical member in which it is adapted to nest.
Claim 5
Dependent Claim
128 words
An assembly of a tempered glass globe with a globe ring for a hazardous location luminaire comprising; a tempered glass globe having a bowl portion merging into a flaring rim portion, said rim portion being substantially circular in cross-section, the walls of said globe being at least 1/4 inch thick and substantially uniform in thickness throughout both portions, said rim portion marking an angle of taper with the vertical in the range of 15° to 45° and defining a section of a conical surface, and a globe ring for supporting said globe and fastening it to a luminaire housing, said globe ring comprising a disc-like metal body having a central conical aperture of predetermined slant length for accommodating said flaring rim portion and making a nonflame-propagating joint therewith.
Claim 6
Dependent Claim
128 words
An assembly of a tempered glass globe with a globe ring for a hazardous location luminaire comprising; a tempered glass globe having a bowl portion merging into a flaring rim portion, said rim portion being substantially circular in cross-section, the walls of said globe being at least 1/4 inch thick and substantially uniform in thickness throughout both portions, said rim portion marking an angle of taper with the vertical in the range of 15° to 45° and defining a section of a conical surface, and a globe ring for supporting said globe and fastening it to a luminaire housing, said globe ring comprising a disc-like metal body having a central conical aperture of predetermined slant length for accommodating said flaring rim portion and making a nonflame-propagating joint therewith.
Claim 7
Dependent Claim
24 words
An assembly as in claim 4 including clamping means located around the rim of said globe holding the globe snugly in said globe ring.
Claim 8
Dependent Claim
34 words
A luminaire comprising the assembly defined in claim 4 and a bell-like metal housing, said globe ring having a threaded periphery engaging mating threads on the inside of said housing at its lower edge.
References Cited (Backward Citations)
US3191021A
Cited
US3675007A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-13 | 1988-05-14 | 1988-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-13 | 1992-05-14 | 1992-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-13 | 1996-05-14 | 1996-11-13 | $7700.00 | Window Closed / Lapsed |